Method of making and assembling laminated structures and apparatus therefor



June 28, 1938. E L, A RETT 2,121,351

METHOD OF MAKING AND ASSEMBLING LAMINATED STRUCTURES AND APPARATUSTHEREFOR Filed .July 6, 1936 3 Sheets-Sheet 1 June 28, 1938 E, BARRETT2,121,851

METHOD OF MAKING AND ASSEMBLING LAMINATED STRUCTURES AND APPARATUSTHEREFOR Filed. July 6, 1936 3 Sheets-Sheet 2 l A "WI/i rm"! 5 64 invenz or' Edward Lfiarr'ez Al p 5 I 1 z I l Y Z/ Patented June 2a, 1938UNITED STAT S 'Me'rnon- OF MAKING AND ASSEMBLlNG LAMINATED STRUCTURESAND APPARA- TUS THEREFOR Edward L. Barrett, La

Utah Radio Products Company, a corporation of Illinois Grange, Ill.,assignor to Chicago, 11].,

Application July 6, 1936, Serial No. 89,051

'19 Claims.

The invention relates to a method of making and assembling laminatedstructures such as vibratory motors, as well as to a novel apparatusparticularly adapted for use in carrying out such method.

It is frequentlynecessary to assemble structures composed of dissimilarlaminations with the individual laminations arranged in preciselydetermined relative positions. Vibratory motors are an example ofstructures of this type and the present invention is especially adaptedfor use in their assembly.

Vibratory motors of the type herein contemplated are frequently used asan element of devices commonly known as B battery eliminators forautomobile radio receiving sets. The function of the vibratory motor orvibrator in such case is to interrupt periodically the flow of anelectric current. The current interruption in magnetic driving means, anarmature carried by the reed which swings past the face of anenergizable pole piece at an extremely small distance therefrom. Theclearance between the pole piece and armature is preferably made of theorder of three thousandths of an inch to minimize the reluctance of themagnetic path therebetween and thus increase the efiiciency andeffectiveness of operation. magneticforce applied to the armature isdecreased so that-it may fail to start while the device will be brokenor rendered inoperative if the armature strikes the pole piece duringits swinging movement. As a consequence this clearance must be adjustedwith great nicety and precision. It will be seen that the difficultiesof effecting these adjustments of the various parts of a vibratory motorare rather great when it is borne in mind that these motors areordinarily made on a large scale production basis.

The primaryobject. of the invention is to provide an improved methodof-assembling laminated structures of such character that the severallaminations may be arranged in certain predetermined relative positionsand secured to-.

gether intheir assembled relation all with a minimum expenditure of timeand by an unskilled operator.--

the vibrator is performed by two or more coopit is common practice toinclude in the electro'-- If the spacing is increased, the' A morespecific object of the present invention is to provide an improved andsimplified method of assembling the parts of vibratory motors in suchmanner that'a relatively unskilled workman is able to assemble withgreat rapidity the parts required to form a completed vibratory 1 motorin which the moving parts such as the contacts, armature and itscooperating pole piece,

are all accurately positioned with respect to each other with greatnicety and precision, the improved method being thus particularlyadapted for use in large scale production.

Another object of the invention is to provide an improved method ofassembling vibratory motors by fashioning a series of sub-assemblieseach having a minimum number of dimensions, which must be accuratelydetermined, and then form- 1 ing the completed device by assembling theindividual sub-assemblies on a jig or fixture including a plurality offixed dimension reference points formed by suitable abutments and gaugesthat cooperate with the accurately dimensioned parts of thesub-assemblies to position the moving parts of thecompleted vibratorymotor in the precise relation required.

A further object of the invention is' to provide I of the motor withoutsacrificing the quality of the finished device.

Further objects and advantagesof the invention will becomeflapparent asthe following descriptions proceed and the features of novelty whichcharacterize the invention are pointed out with particularity in theclaims annexed to and forming a part ofthis specification. I

For a better understanding of the invention, reference may be had to theaccompanying drawings, in which t Figure 1 is a perspective view of avibratory motor made in accordance with the present invention.

Fig. 2 is an exploded perspective view of the component parts of thevibratory motor shown in Fig. 1 illustrating particularly the varioussub-assemblies used in forming the same. Fig. 3 is a side elevationof. anovel fixture preferably utilized in assembling the vibratory motorshown in Fig. 1.

Fig. 4 is a detail-view of one of the removable pins used with thefixture shown in Fig. -3.

Fig. 5 is a detail perspective view of a wedging device used with thefixture shown in Fig. 3.

Fig. 6 is a plan view of the fixture shown in Fig. 3.

means for alining the contacts and reed of the motor.

Fig. 9 is a detail perspective view of a removable portion of thefixture shown in Fig. 3.

Fig. 10 is a longitudinal section of the fixture illustrating the firststep in the method of assembling the vibratory motor on the fixture.

Fig. 11 is an enlarged longitudinal section of the fixture similar toFig. 10 and illustrating a subsequent step in the assembling of thevibratory motor.

Fig. 12 is also an enlarged longitudinal section of the fixtureillustrating the final steps inthe assembly of the vibratory motorthereon.

For purposes of illustration, the novel method of assembly and apparatusfor use therein con-' templated by the present invention have beendescribed herein as applied to the assembly of a laminated vibratorymotor of the type described and claimed in the copending applicationSerial No. 52,987, filed December 5, 1935, by Edward L. Barrett and MaxJ. Manahan, and issued as Patent No. 2,072,578. It will be understood,however, that the present invention is applicable to a large number ofother types of vibratory motors and similar laminated structures.

The vibratory motor. shownin Fig. 1-is of a generally laminatedconstruction and includes a plurality of make and break contactsillustrated in the form of a pair of relatively fixed contacts I and II,which cooperate with movable contacts l2 and I3, carried by a vibratoryreed l4. These make and break contacts serve to periodically interruptelectrical circuits such as the input circuits of the primary winding ofa stepup transformer (not shown) in a B-battery eliminator. The reedll'is vibrated at a relatively high frequency of the order of 120 cyclesper second by a suitable electromagnetic driving arrangement which inthe present instance, includes a pole piece I 5 energized by anelectromagnet winding l6 and a cooperating armature I! carried by thereed. The entire structure is.

mounted as a unit on a rigid supporting member such as the rectangularfiat frame l8 illustrated.

From the foregoing, it will be apparent that the vibratory motorillustrated embodies two principal sets or groups of relatively movingparts; first the armature l1 and its cooperating pole piece l5; andsecond, the two sets of cooperating make and break contacts. Theclearances between these parts and alinement thereof must be set withgreat precision and accuracy if the completed device is to operatesatisfactorily. This will be even more apparent when the order ofmagnitude of the dimensions involved is considered. Thus, the clearancebetween the adjacent portions of the armature I1 and the pole piece I5is approximately only about 0.003 inch. Moreover, the cooperatingcontacts must be accurately alined both transversely and longitudinallyso that they will meet squarely upon contact thereof if undue wear andarcing is tobe avoided in the completed device. The clearance betweenthe pole piece l5 and armature I1 is very critical since if it is toolarge, the reluctance of the magnetic path therebetween will be greatlyincreased so that the device may fail to start when a predeterminedminimum voltage is applied to the energizing winumg it. 'Thus, when sucha vibratory motor is used in an automobile radio receiving set, forexample, the battery voltage may be manufactured, th'eparts could befabricated by skilled machinists with extreme accuracy so that theproper clearances could behad. In ordinary commercial practice,however,'when thousands of these motors are being produced in a singlefactory, such a procedure is impractical. ,In such commercial practiceit is desirableto form most of the partsof the. device by punch pressoperations'and in addition the assembly operations are usually performedby relatively unskilled workmen.

The present invention contemplates the utilization of a novel method ofassembly by means of which the desired accuracy in clearances andalinement for the completed device is had with the use of a. minimumnumber of precise or accurate dimensions in the component parts, and inwhich a minimum amount of reliance is placed upon the skill of theoperator. In constructing such a vibratory motor, a plurality ofsub-assemblies are preferably fabricated individually and then assembledto form the complete unit. In the device illustrated, three principaltypes of sub-assemblies are preformed prior to the final assemblyoperation. These sub-assemblies are, first. a reed assembly designatedgenerally by the numeral l9; second, two similar contact supportingassemblies designated by the numerals 20 and 2 I, respectively; andthird, a frame assembly designated by the numeral 22.' It will be notedthat these sub-assemblies are all arranged in theform oi superposedlaminations.

The reed assembly l9 includes a reed H of generally rectangular shapemade of a high grade a of spring steel, for example. An elongatedapervide certain desired resilient characteristicsv therein. ThearmatureI1 is made of steel or other magnetizable material having a highmagnetic permeability and is substantially rectangular in shape. Thearmature is spot welded or otherwise rigidly secured to: the upper edgeof the reed I 4. The outer face of the armature is slightly curved orslanted so that it will not contact the adjacent face of the pole piecedespite its arcuate path of movement. The contacts I2 and iii aresupported on the reed M by a pair of contact supporting members 24 towhich they are preferably welded in order to reduce as much as possiblethe weight on the reed. The members 24 span the aperture 23 and arerigidly secured at their opposite ends to the reed M by brass rivets 25.The reed assembly l9 thus constituted is formed in such manner that theparts thereof will be arranged in a predetermined accurately dimensionedrelation. Preferably the reed l4 itself is cut from suitable stock'by acompound dielgso that the marginal edges and apertures therein are allformed simultaneously by the same die. The armature I! is secured to thereed and the contacts I2 and I3 are secured to the members 24, allbefore-the latter aresecured to the reed l4. Then the reed. l4 andmembers 24 are positioned in a suitable jig or work fixture and heldtherein in predetermined relation while the rivets 25 are secured inplace. .The centers of the. contacts I2 and I3 are thus positioned at anaccurate'y determined longitudinal distance {a. (Fig. 2 from the forwardface of the armature i1 and at an accurately determined lateral distanceb from the parallel side edges of the reed.

The contact supporting sub-assembly 28 ineludes an elongated contactsupporting member 3| are formed on the lower edge of the contactsupporting member 26 and serveto aid in positioning the sub-assembly 28during the. assembly operation, as hereinafter described. Thepermissible size'of the holes 28 is somewhat limited by the necessityfor minimizing the size of the base portions of the members 26 as wellas to avoid reducing the cross-sectional area of any part thereof beyonda safe amount. On'the other hand the edges of holes 28 must be out ofelectrical contact with the screws positioned there:

in and even spaced a sufficient distance therefrom so that any metalshavings or the like which get in the same during manufacture will notcause a short circuit in the completed device.

Consequently the holes 28 must be located in an accurately determinedposition with respect. to the ears 3| which determine the position ofthe members 26 during the final assembly operation. Also the contacts l8and H should be located at a fairly accurate distance c''from the outerends of the ears 3| so as to bring, them into longitudinal alinementwith the contacts l2 and I3 as will hereinafter appear. A compound dieis preferably used to form, the supporting members 26 so that theapertures therein as well as the edge configuration are all formedsimultaneously and in a predetermined relative position withoutpossibility of error by a single stamping operation.

The other contact supporting-sub-assembly 2| is in general identicalwith the sub-assembly 28 described above except 'thatthe contact Hincluded therein faces in the opposite direction with respect tothecontact 18.;The same numerals have been used to identifyidentical partsand it will thus be seen that the sub-assembly 2|" includes acontactsupporting member 26 having a rectangular base portion 21 provided withenlarged holes 28 therein. Positioning ears 3| are also provided on thelower edge of the supporting member 26.

The frame assembly 22 is shown in Fig. 2 with the energizing winding l6removed in order to better illustrate" the construction thereof. Itwillbe understood that the winding I 6 is secured in place on the polepiece 15in the course ofthe fabrication of the sub-assembly 22. Theframe [8 is generally rectangular in shape being stamped or otherwiseformed from a sheet of. iron or other material having a relatively highmagnetic permeability. The pole piece 15 is integral with determineddistance.

1 spacers having registering holes 38 and 38f the upper end of the frameI8 and extends into a centrally located rectangular opening 32 definedthereby. It will be noted that the. side members 33 of the frame 18' areoffset from the The frame assembly 22 need have at most only' oneaccurately determined longitudinal dimension when the vibrator isassembled in accordance with the present invention. This dimension isthe distance d between the upper edge of the frame l8 and the activeface of the pole piece [5.

In addition the inner edges of the side members 33v are parallel andspaced apart an accurately The entire frame and pole piece are formed bya single punch press operation to effect this dimensioning. That is the.

outer edge of the frame and end of the pole piece are preferably formedby a single shearing open-.\ 5

ation.

A pair of rectangular metal spacers 36 and 31 "are positioned onopposite sides of the 'baseiiof the frame l8 and reed M, respectively,"these Brmed therein. It will be noted that the spacer 36 is providedwith an upstanding terminal portion 36 adapted for connection to anelectrical conductor. An electrical circuit is completed from theterminal 36 to the contacts I 2 and I3 through the metal spacer 36,frame l8, reed l4 and contact supports 24. A second metal spacer 40having registering holes 4| formed therein is positioned on the spacer31 so as to compensate for the thickness of the frame l8 in spacing thecontacts I0 and Il equidistant from the contacts l2 and I3;respectively.

Rectangular insulating members-42 are posi-' insulating members 42 arealso provided with registering holes 43. Rectangular end members 44 and45 are placed on the opposite faces of. the

stack formed by the parts described above. A pair of screws 46 passthrough registering holes 41 formed in the end member 44 as well asthrough the registering holes in the other members of the stackdescribed above and are threaded in tapped holes 48 formed in the endmember45.

After the laminations or elements of the structure such as thesub-assemblies, spacers and insulators have been formed as'describedabove they are assembled to forrrI' a complete vibratory motor. Ingeneral this assembly operation comprises arranging the laminations insu'per posed relation in predetermined order, bringing the laminationsapproximately into predetermoving the, opposed portions of suchlaminations as the reed and frame into abutment with the.

opposite sides of a gauge to space the same accu rately, and securingthe laminations fixedly together. The holes in the laminations arepreferably brought into alinement by-stringing them on a positioning pinor the like and one or more fixed abutments may be used to guide thelamipin.

The final assembly of they laminations or elements is preferablyperformed on an improved jig or work fixture exemplified by the fixture50 in Fig. 3. A base 5| supports three principal andadjustment. In theconstruction illustrated,

these principal members for effecting longitudinal positioning are apair of opposed abutments spaced apart a predetermined distance and aflexible fiat sheet metal gauge of carefully determined thickness.formed by a pair of vertical pins 52 rigidly secured to the base 5| inspaced relation and adapted to bear against the end face of the frame I8(Fig.

7). The second abutment is formed by the inner faces of vertical grooves53.f.ormed in a block 54,

' which is also rigidly secured to the base Si, by

pins 46 the inner faces of the grooves being located at a predetermineddistance from the opposed faces of the pins 52. The third membar, orgauge, is illustrated in the form of a thin .the contacts I 2 andsubstantially. rectangular flexible sheet of metal 55, which is securedin a vertical position by a screw 56 to a face of. a supporting block51'. The block 51 is preferably detachably secured to "the fixture base5| by a vertically extending pin 58, which is rigidly secured to thebase 5| and adapted to be slidably positioned in a hole. 59

formed in the bottom of the block 51. The pur-,

pose of the detachable connection between the block 51 and base 5! isdescribed more in detail below. Y

The cooperating make and break contacts are brought into lateralalinement also during the assembly operation by 'a suitable abutment andspacing gauge arrangement on the fixture 50;

The lateral positioning of the contacts I and ii secured to the contactsupports 25 is fixed by the ears 3| which are disposed in the abutmentgrooves 53. In addition the extended portions 29 of the supports 26 aredisposed within a complementary arcuate recess 60 formed in anupstanding projection 51 (Fig. 9). This recess also aids in alining thecooperating contacts. As was pointed out above l3 are located at anaccurately dimensioned lateral distance froin the edges of the reed I. Apair of thin sheet metal vertically disposed gauges 62 and 63 secured tothe opposite sides of the block 51 by plates 64 serve to position thereed laterally so as to bring the con-,- tacts l2 and I3 into lateralalinement with the contacts I II as shown in Fig. 8. A more importantfunction of the gauges 52 and 63 is to determine v accurately thespacing between the adjacent portions of the reed i4 and side members 33of the frame l8.

In assembling the vibrator described above on the fixture 50, the endmember 45 of the stack of laminations of the vibratory motor is firstpositicned on the fixture 50 by a pair of removable pins 46". Thereduced lower endportions oi the pins 46* are inserted'through the holes48 in the end member 45 and in a pair of holes formed in the base 5| ofthe fixture. When the pins 46 are not in use, they may be placed inreadily accessible receptacles 46'' mounted on the end of base, plate 50of the'fixture 50. Ihe position of'the assembly pins 16 during theassembling operationis'shown in Fig. 10. The remaining One of theabutments is El formed on the removable block 2,191,851 nations intoposition as they are strung on the parts of the vibratory motor are.then strung on the pins 46 in propensequence. The pins 46* thus passthrough the registering holes formed inthe base portions thereof so asto position them approximately in their proper alinement. Thepositioning pins 46 are then lifted out of the holes in the parts of themotor and placed in the receptacles 46 Then the screws 46 are insertedinto the alined holes in the laminations and are screwed part way intothe tapped holes formed in the end member 45 so that the reed I4 is'heldin position on the frame I 8, as shown in Fig. 11, in such manner that alimited amount of relative longitudinal movement is permitted.

After the laminations of the vibratory motor have thus been assembled onthe fixture 50 as shown in Fig. 11 and approximately in their properpositions, they are then moved into accurately determined relativepositions. The armature I'i is preferably first positioned in theprecise relation desired with respect to the end of the pole piece i 5since this is the most critical dimension in the completed unit. In thearrangement illustrated, the armature i1 is moved wedgingly intoengagement with the adjacent surface of the gauge 55 by a wedge pin 65.The requisite slight longitudinal motion of the reed I4 is permitted bythe small clearance between the holes 35 and the screws 45. Thus, thepin 65 is inserted into a complementary recess or hole 66 formed in thefixture 50 and a flat angularly disposed front surface 61 thereof bearsagainst the rear edge of the armature ii. A knurled head 68 is formed onthe pin 65 in order that it may be readily gripped by the operator andthis head is also preferably provided with a fiat surface 69 thereonwhich is located at 90 degrees about the axis of the pin with respect tothe wedging surface 61. Thus, if

the operator places the thumb of his right hand against the flat surface69 and inserts the Pin 55, the wedging surface 61 will always be broughtinto contact with the rear edge of the armature l1. As the pin 65 ispushed downwardly into the hole 66, the armature I1 is moved to the leftas viewed in Fig. 12 so that it presses against the sheet metal gauge55. Since the gauge 55 is resilient, it is consequently moved overslightly into firm contact with the end surface of the pole piece l5. Asa result of this relative movement of the pole piece l5 and armature l1into tight contact with the opposite faces of the gauge 55 the adjacentportions thereof are accurately spaced a predetermined distance. As waspointed out above, this clearance or distance is ordinarily of the orderof about 0.003 inch so'that very little tolerance or variation ispermissible.

While the pin 65 is still in the position described above, thus holdingthe armature I1 and pole piece I5 in proper position, the ears 3i on thecontact supporting members 26 are firmlyseated against the bottoms ofthe grooves 53. By

thus moving these projections or ears 3| against such a fixed abutment,the contacts l0 and ii are spaceda predetermined longitudinal distance 0from'this fixed abutment on the fixture. At the same time, the contactsl2 and i3 carried by the reed M are also spaced a predeterminedlongitudi- 1 ml distance from the fixed abutment 52 on the fixtureiilsince, as was noted above, the length d of the pole piece l5 from theouter end oithe frame, the thickness of the gauge 55, and the distance afrom the outer face of the armaturetions having apertures incorresponding portions mined distance from the ends of the projectionsorcars 3|, which are in turn pressed tightly against another portion ofthe fixture 50, namely the bottoms of the grooves 53. As has beenpreviously noted, the gauges 62 and 6,3 are positioned between thelateral edges of the reed i4 and the adjacent portions of the frame sidearms 33, thus spacing the same equidistantly therefrom. Also, thesegauges serve to center the reed l4 and the contacts I2 and I3 carriedthereby'transversely with respect to the center line of the fixture 5.0.

The projections 3| on the contact supports 26 cooperate with theabutment grooves 53 to position the contact supports accurately in atransverse direction with respect to the center line of the fixture 50so that the cooperating make and break contacts I to l3, inclusive, arebrought into transverse alinement. After the parts have been thus alinedon the fixture in the manner described,'the screws 46 are then screwedtightly into the tapped holes 48 in the end members 45 so-that the partsofthe vibratory motor are held fixedly, in their assembled positions.

After the vibratory motor has been assembled as described above, thewedging pin 65 isremoved and the completed vibrator is lifted off of thefixture 50. In case the gauge 55 or the gauges 62 and 63bind on theassociated parts of the vibratory motor due to their frictional contacttherewith, the block 51 may be lifted off of the fixture base at thesame time the vibratory motor is removed therefrom. The gauges may thenbe readily disengaged from the cooperating parts of the vibratory motorwithout danger of distorting the reed or other parts of the device.

From the foregoing, it will be apparent that a simple and economicalmethod of assembling laminated structures such as vibratory motors hasbeen provided. In applying this improved method tothe particularvibratory motor illustrated, the critical dimensional relations of thevarious parts are all determined with great nicety and precisioneventhough the assembly operation be carried out'by a relativelyunskilled operator. These critical dimensional relations for theparticular device illustrated are as follows in the order of theirimportance: first, the clearance between the armature IT and pole piecel5;

second, the clearance between screws 46 and the edges of the holes 28 inthe contact supports 26; third, the clearance between thetransverseedges of'the reed and the adjacent side arms 33 of the frame l8; andfourth, the alinement of the cooperating make and break contacts.

Although a particular embodiment and application of the presentinvention has been described and illustrated in detail as anexemplification thereof; it should be understood that no intention mayproperly be inferred from this action to limit the invention to theparticular embodiment and application described, but on the other hand,it is intended to cover in the ap ended claims all modifications withinthe spiri and scope of the invention.

I claim as my invention:

1. The method of assembling a laminated structure such as a vibratorymotor, including laminathereof, which comprises, stringing thelaminations in superposed relation and predetermined order on anassembly pin or the like inserted through the apertures therein, guidingthesup'er- .posed laminations approximately into their proper relativepositions in the assembly, moving the opposed portions of a plurality ofthe laminations lying in generally common plane into abutment with theopposite sides of a gauge to space the same accurately, and securing thelaminations fixedly together. 4

2. The method of assembling a laminated structure such as a vibratorymotor, including laminations having apertures therein, whichcomprises,assembling the laminations in superposed relation in a predeterminedorder, bringing the laminations approximately into their predeterminedrelative positions byarranging the holes therein substantially inalinement, moving the opposed portions of a. plurality of thelaminations lying in a generally common plane into abutment with theopposite sides of a gauge to space the same accurately, and securing thelaminations fixedly together.

3. The method of assembling a vibratory motor provided with an openrectangular fiat sheet metal frame having an integral pole pieceextending into the opening defined by the'frame and an armature carriedon the free end of a flat sheet metal reed adapted to swing past thepole pieces in close proximity thereto-in the operation or the device,the reed and frame having holes in the portions thereof opposite theends on which the pole piece and-armature are carried, which comprises,positioning the reed and frame in faceto face contact with a portion ofthe reed overlying the opening defined by the frame, bringing thearmature and pole piece approximatelyinto their proper relativepositions by stringing the same on a positioning pin or. the like andthus bringing the holes into registration, securing the reed loosely onthe frame in such position so as to maintain the parts approximately insuch position while permitting a limited amount of endwise movementtherebetween, spacing the adjacent portions of the pole-piece andarmature a precise distance apart, and fixedly securing the reed to theframe while maintaining such spacing. 1

4. The method of assembling a vibratory motor including a frame havingan energizable pole piece rigid therewith and an armature carried by thefree end of an apertured resilient reed and adapted to swing past thepole piece in closeproximity thereto in the operation of the device,

which comprises, positioning the frame against a.

fixed abutment, placing the reed on the frame with the armature disposedapproximately in position adjacent the end of the pole ,piece, securingthe reed loosely in such position, inserting a thin metal gauge betweenthe adjacent portions of the armature and pole piece, exerting a wedgingpressure on a wall of the aperture, in the reed against the resistanceof the fixed abutment and thereby moving the armature into engagement.with one.face of the gauge while moving the other face of the gauge intocontact with the end of the pole piece thus accurately determining theclearance between the armature and the pole piece, and rigidly securingthe reed to the frame 4 while maintaining the armature and pole piece incontact with the gauge.

5. The method of assembling a vibratory motor provided with a framehaving an energizable pole piece rigid therewith and an armature carriedby the free end of a resilient reed and adapted to swing past the polepiece in close proximity thereto in the operation of the device, whichcomprises, positioning the reed on the frame with the armature disposedapproximately in position in contact with the gauge.

. 6. The method of assembling a vibratory motor having a frame providedwith spaced elongated side arms and a fiat vibratory reed adapted toswing in a plane transverse to the common plane of said side arms, thereed and frame having holes in corresponding portions thereof, whichcomprises, stringing the reed and frame in superposed relation on apositioning pin or the like, guiding the reed and frameapproximatelyinto position, inserting thin sheet metal gauges betweenthe lateral edges of the reed and the adjacent portions of the frameside arms to space the lateral edges of the reed equidistantly from theside arms of the frame, and securing the reed fixedly to the frame'insuch position.

7. The method of assembling a vibratory motor provided with a framehaving spaced side arms connected by an end member having 'a pole piecethereon with the end of the pole piece located a predetermined distancefrom the end of the frame and a pair of cooperating make and breakcontacts carried by respective sheet metal supporting members, one ofsaid contacts being located a predetermined distance from an end of itssupporting member and the other of said contacts being located apredetermined distance from the opposite end of .its supporting member,which comprises, positioning said supporting members on the frame withportions thereof overlying the aperture therein and with the contactsapproximately in alinement, positioning the end of the frame against afixed abutment and positioning the end of one of the contact supportingmembers a predetermined distance from such end of the frame to bring thecontact carried thereby a predetermined distance from the fixedabutment,

and positioning the end of the other contact carrying member, against asecond fixed abutment located a predetermined distance from the firstfixed abutment to bring the contacts accurately into alinement, andsecuring the supporting members fixedly to the frame while in suchpositions.

8. The method of assembling a vibratory motor having a frame providedwith spaced elongated side arms and a flat vibratory reed adapted toswing in a plane transverse to the common plane of the side arms, thereed having an armature on the free end thereof adapted to swing pastthe pole piece in close proximity thereto in theoperation of the device,which comprises, positioning the reed on the frame between the side armsthereof and with the armature disposed approximately in positionadjacent the-end of the pole piece, securing the reed loosely in such'position, moving the reed and pole piece longitudinally relatively withrespect to each other until the adjacent portions thereof are spaced anaccurately determined distance, securing the reed and pole piece againstrelative longitudinal movement when in such accurately determinedposition, moving the reed and frame laterally, relatively with respectto each other until the lateral edges of the reed are spacedequidistantly from the side arms of the frame, and securing the reedfixedly to the frame in such position.

9. The method of assembling a vibratory motor provided with a flat sheetmetalframe having a rectangular aperture therein with an integral polepiece extending into said aperture and an armature carried on thefree'end of a flat sheet metal reed adapted to swing past the pole piecein. close proximity thereto in the operation of the device, the reed andframe having holes in the portions thereof opposite the ends on whichthe pole piece and armature are carried, which comprises, positioningthe reed and frame in face-toface contact with a portion of the reedoverlying the aperture in the frame, moving the pole piece and armatureapproximately into their proper relation by stringing the same on apositioning pin or the like and thus bringing the holes intoregistr'ation, securing therreed loosely on the frame in such positionso as to maintain the parts approximately in such position whilepermitting a.

position.

10. The method of assembling a vibratory motorprovided with a fiat sheetmetal frame having a rectangular aperture therein with an integral polepiece extending into said aperture, an armature carried on the free endof a fiat sheet metal reed adapted to swing past the pole piece inclose. proximity thereto in the operation of the device, and cooperatingcontacts carried by the reed and a sheet metal contact support, themotor parts having holes in corresponding portions thereof, the holefashioned in said contact sup-' port being larger than the other holes;which comprises, arranging the frame, reed and contact support insuperposed relationin the order named with an apertured insulating stripbetween the in face-to-face contact with a portion of the reed overlyingthe aperture in the frame, moving the pole piece and armatureapproximately into their proper relation by bringing the holes thereininto registration, positioning the holes in each of the motor parts inconcentric relation by stringing the same on a positioning pin-or thelike, securing the reed loosely on the frame in such position so as tomaintain the parts approximately in such position while permitting alimited amount of relative movement therebetween, spacing the adjacentportions of the pole piece and armature a precise longitudinal distanceapart, moving the reed'and frame laterally with respect to each otheruntii the lateral edges of the reed are spaced equidistantly from theadjacent side edges of the aperture in the frame, and inserting asecuring member into the alined holes to hold the parts fixedly inposition with the edges of the larger hole in spaced relation to thesecuring member..

which comprises fashioning the following subassemblies (a) a framehaving an energizable pole piece thereon provided with an active facelocated atv an accurately. dimensioned distance from an oppositelyfacing bearing surface on the frame, (b) a flat sheet metal resilientreed havin an armature secured to the outer end thereof andan electricalcontact secured to the intermediate portion thereof at an accuratelydimensioned distance from the outer face of said armature, (a) a sheetmetal contact support with an electrical contact secured-theretoadjacent its outerend at an accurately dimensioned distance from abearing surface thereon; and assembling said sub-assemblies bypositioning the bearing surface on the frame against a fixed abutment.

securing the reed loosely tothe frame with the armature disposedapproximately in position ad- Jacent the active face of the polepiece,inserting a gauge between the adjacent portions of the pole pieceand armature, moving the armature toward the pole piece thus bringingthe armature and pole piece into contact with the opposite faces of thegauge to space the same accurately, positioning the bearing surface onthe contact support against a second fixed abutment located,

at a predetermined distance from the first-named abutment and in opposedrelation thereto thereby bringing the contact on the contact supportinto alinement with the contact on the reed, and securing portions ofthe reed and the contact support rigidly to the frame in such positions.

12. A fixture-for use in assembling a laminated structure such as avibratory motor comprising, in combination, a base, means on said basefor maintaining the superposed laminatious of the structureapproximately in their proper relative podtlons, a'thin'fiexible gaugeinsertabie between opposed edge portions of a pluranty of thelaminations in abutting relation thereto, and

means'for detachably securing said gauge to said base whereby the gaugemay be removed from 'the base with the assembled laminated structure andsubsequently disengaged therefrom without danger of distorting-theabutting laminations.

13. A fixture for use in assembling a laminated structure such asavibratory motor comprising, in combination, a base, a positioning picarried by said base and adapted to have apertured. laminations strungthereon in superposed relation, means for guiding the laminations strungon said pin into predetermined relative positions, a gauge carried bysaid base and insertable between opposed portions of a plurality of saidiaminations, and means for moving the opposed portions of suchlaminations into contact with guiding a portion of said laminations intoenact final positions, and means including a huge carried by said baseand insertable between opposed edges of a second portion of the 1.laminaticns for accurately positioning the same intheirfinalpositions.

15.1 fixture adapted for main assembling avibratosymotorincludingaframe-having-sn energizable pole piece rigid therewith and an armaturecarried by the free end of an apertured resilient reed and adapted toswing past the pole piece in close proximity thereto in the operation ofthe device; comprising in combination, a base,

means including a longitudinally movable pinextending outwardly fromsaid base and adapted to be inserted into registering holes in the motorparts for positioning them in superposed relation withthe armaturedisposed approximately in position adjacent the end of the pole piece, athin metal gaugemounted on said base and disposed between the adjacentportions of the armature and pole piece, means for exerting a wedgingpressure on a wall of .the aperture in the reed to move. the armatureinto contact with'said gauge, and means including a fixed abutment onsaid base for resisting endwise movement of the frame when said gauge"is pressed between the adjacent faces of the pole piece and'armature.

16. The method of making a frame sub-assembly for a vibratory motor,which-comprises. punching from'a sheet of metal a substantially fiatrectangular portion of sheet metal having a central opening therein withan integral pole piece extending into the opening, said punchingoperation including a simultaneous shearing of the end of the pole pieceand the adjacent outer edgeof the frame in order to space such edge andsuch end a predetermined fixed distance.

17. The method of assembling a laminated structure such as a'vibratorymotor, including laminations having apertures in corresponding portionsthereof. whichvcomprises. stringing the laminations in superposedrelation and predetermined order on an assembly pin inserted through theapertures therein. positioninga gauging member in frictional engagementwith opposed portions of a plurality, of the laminations which arespaced apart in the general plane thereof not only to position thelaminations accurately with respect to each other but also to hold thesame frictionaily in such position, then removing the assembly pin andinserting a securing- 1 member in the apertures previously occupied bythe'pin. Y 7

18. The method of assembling a laminated structure such as a vibratorymotor, including a plurality of laminations, which-comprises, ar-

ranging the laminations in superposed relation and predetermined orderin approximately the desired relative positions thereof, moving'theopposed portions of a plurality of the laminations spaced apart in thegeneral-plane thereof into abutment and frictional engagement with theopposite sides of a thin metal gauge inserted therebetween, and securingthe laminations fixedly together while disposed in frictional engagementwith the gauge.

llhfixtureforuseinassembllngalaminated structure such as avibratory-motor comprising, in combination, a. base, means on said basefor maintaining. the laminations of' the structure approximately in.their proper relative positions. and sgsuge insertable between op-'posededgeportionsof aplurality ofthelaminationsin abutting relationthereto and loosely disposed" on said base whereby the gauge may be-liftetirrornthebasewiththess'sembledlaniinatedstructureandsuhsequentlsdisengagedtherefromwithoutdangeljofdistorting the timhminationa

